For those who are curious below is the provision in the ADS merger agreement dealing with specific performance and the reverse termination fee. This one is better drafted than the Cerberus/URI one (with a big but about the limited guarantee), and I'll have more tomorrow.

Section 9.8.2 The Parties agree that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that, prior to the termination of this Agreement pursuant to Section 8.1, Parent and Merger Sub shall be entitled to an injunction or injunctions to prevent breaches of this Agreement by the Company and to enforce specifically the terms and provisions of this Agreement, in addition to any other remedy to which they are entitled pursuant to the terms of this Agreement, at law or in equity. Notwithstanding the first sentence of this Section 9.8.2, however, the Parties acknowledge that the Company shall be entitled to an injunction or injunctions to prevent breaches of this Agreement by Parent or Merger Sub or to enforce specifically the terms and provisions of this Agreement only to prevent breaches of or enforce compliance with those covenants of Parent or Merger Sub that require Parent or Merger Sub to (x) use its reasonable best efforts to obtain the financing contemplated by the Commitments, including without limitation, the covenants set forth in Section 6.5 (Reasonable Best Efforts) and Section 6.14 (Financing) and (y) consummate the Merger, if in the case of clause (y), the financing provided for in the Commitments (and, if alternative financing is being used, pursuant to commitments with respect thereto) is available to be drawn down by Parent pursuant to the terms of the applicable agreements but is not so drawn solely as a result of Parent refusing to do so in breach of this Agreement. For the avoidance of doubt, whether or not the Company is entitled to seek injunctions or specific performance pursuant to the provisions of the preceding sentence or otherwise, in no event will the Company be entitled to seek monetary damages in excess of (i) $3,000,000 with respect to the reimbursement and indemnification obligations of Parent under Section 6.15 (the third and fourth sentences thereof), Section 6.16.3 (first and third sentences thereof) and Section 6.16.6 and (ii) $170,000,000, in the aggregate, inclusive of the Business Interruption Fee, if applicable, for all other losses and damages arising from or in connection with breaches of this Agreement by Parent, Merger Sub or any Parent Representative or otherwise relating to or arising out of this Agreement or the transactions contemplated by this Agreement. Any legal action, suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby shall be brought solely in the Chancery Court of the State of Delaware; provided that if (and only after) such courts determine that they lack subject matter jurisdiction over any such legal action, suit or proceeding, such legal action, suit or proceeding shall be brought in the Federal courts of the United States located in the State of Delaware; provided, further, that if (and only after) both the Chancery Court of the State of Delaware and the Federal courts of the United States located in the State of Delaware determine that they lack subject matter jurisdiction over any such legal action, suit or proceeding, such legal action, suit or proceeding shall be brought in the United States District Court for the Southern District of New York. Each Party hereby irrevocably submits to the exclusive jurisdiction of such courts in respect of any legal action, suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby, and hereby waives, and agrees not to assert, as a defense in any such action, suit or proceeding, any claim that it is not subject personally to the jurisdiction of such courts, that the action, suit or proceeding is brought in an inconvenient forum, that the venue of the action, suit or proceeding is improper or that this Agreement or the transactions contemplated hereby may not be enforced in or by such courts. Each Party agrees that notice or the service of process in any action, suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby shall be properly served or delivered if delivered in the manner contemplated by Section 9.2.